La humedad del aire y las precipitaciones

3.1. La humedad del aire La humedad es la cantidad de vapor de agua que se encuentra en el aire. El vapor llega al aire procedente del agua de los mares y océanos, de los ríos, de los lagos, de las…

Los grandes ejes industriales de la Unión Europea

5.1. Las principales zonas industriales de la Unión Europea La Unión Europea es una de las áreas más importantes de producción industrial, junto con América del Norte, Japón y China. La actividad…

Transport between cells

2.1. The circulatory system The circulatory system is made up of blood vessels (arteries, veins and capillaries). The heart pumps the blood through the blood vessels to reach all the cells in the body.…

Calculate. Work and energy

Remember what you have studied in this section and answer the questions: How much work is done by a person who moves a piano (which is parallel to the ground) 10 m using a force of 200 N? A person does…

End-of-unit activities - Heat and temperature

Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. Thermal energy is involved in many processes in our daily life, like cooking food, making a hot…

Choose. The restoration and the Liberal Triennium

Choose the correct answer: What did Ferdinand VII do on his return to Spain in 1814? What did the restoration of absolutism mean for Spain? What is a pronunciamiento? Which pronunciamiento was…

Summarise. The age of imperialism

Summarise the text. Write paragraph headings. By the year 1870, the industrialised nations had entered a period of economic prosperity and demographic growth due to advances made during the Second…

Final self-evaluation T11 10 - A bipolar world: the cold war and decolon...

Match each definition with a concept: US economic help for the reconstruction of Europe after the Second World War. Post-war rivalry between the United States and the Soviet Union. Document representing…

Materiales

Razón de los perímetros y de las áreas. Actividad 4

La razón de las áreas de dos polígonos semejantes es 16 25 . ¿Cuál es la razón de sus perímetros? Expresa el resultado en forma decimal. La razón de sus perímetros es .